Check a VIN

February 3, 2025 Service bulletin

MBUX headunit display with red text box "System Inoperative". ONLY for vehicles with SA code (549+21U) or...

Mercedes-Benz technical service bulletin LI54.71-P-078802 for 2016-2022 Mercedes-Benz GLC 300, 2021-2025 Mercedes-Benz GLA 250 and 2020-2025 Mercedes-Benz GLB 250 and others.

Bulletin number
LI54.71-P-078802
Component
Electrical system
Summary
Complaint MBUX headunit display with red text box "System Inoperative". ONLY for vehicles with SA code (549+21U) or (549+U19). Cause Under analysis. Remedy For chassis 118, 167, 177, 213, 238, 243, 247, 253, and 293 use Xentry to update headunit (A26/17). Target software number is 247 904 6600 (E905.4).

Owners of these vehicles have filed 305 complaints in the electrical category.

Vehicles covered

VIN decoder

See the problems and recalls for an exact car

Buying a used Mercedes-Benz GLC 300?

Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.

Check its history